I do not use a sg or anything else i just watch my rpms never letting it go over 2000 after i get up to speed i hold the rpms steady and not the speed, i still fill up to get my mileage which ive been doing about 6gal. a trip when testing, putting on a wai would lower the power of your motor which in most cases is better for mpgs, if u learn how to correctly use a vacuum gauge for mileage it will help
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"The only real mistake is the one from which we learn nothing."
- Henry Ford
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